CN110055644A - A kind of production method of the different contraction composite fiber of PLA polylactic acid - Google Patents
A kind of production method of the different contraction composite fiber of PLA polylactic acid Download PDFInfo
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- CN110055644A CN110055644A CN201910447939.5A CN201910447939A CN110055644A CN 110055644 A CN110055644 A CN 110055644A CN 201910447939 A CN201910447939 A CN 201910447939A CN 110055644 A CN110055644 A CN 110055644A
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- Prior art keywords
- polylactic acid
- tow
- melt
- raw material
- hot
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Classifications
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D1/00—Treatment of filament-forming or like material
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
- D01D10/02—Heat treatment
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D4/00—Spinnerette packs; Cleaning thereof
- D01D4/06—Distributing spinning solution or melt to spinning nozzles
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/12—Stretch-spinning methods
- D01D5/16—Stretch-spinning methods using rollers, or like mechanical devices, e.g. snubbing pins
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]
Abstract
The present invention relates to a kind of production methods of different contraction composite fiber of PLA polylactic acid.The production method includes: first that polylactic acid raw material is dry；Polylactic acid raw material after being subsequently dried enters screw extruder and carries out melting compression, compressed polylactic acid raw material is melted to enter in filament spinning component, melt stream tow is sprayed by filament spinning component, melt stream tow is divided into the mutually independent part FDY tow and the part POY tow, subsequent two parts tow is through cross air blowing device, oiling device and path are cooled down, then the part FDY tow is stretched through two pairs of hot-rolling group tractions, to guarantee the product quality of the part FDY tow, the part FDY tow after the traction of two pairs of hot-rolling groups stretches with the part the POY tow stretched through two draw-off godets tractions enter together master network device it is network combined it is grid-connected after, spinning cake is wound into up- coiler.The present invention is conducive to effective popularization of the different contraction composite fiber of PLA polylactic acid.
Description
Technical field
The invention belongs to textile chemical fiber production technical field more particularly to a kind of different contraction composite fibers of PLA polylactic acid
Production method.
Background technique
Polylactic acid (full name in English: polylactic acid, abbreviation PLA) fiber, the raw material polylactic acid used is from plant
Object, non-fossil fuel, fiber has natural degradation, while having similar silky luster and feel, has certain water imbibition,
It is a kind of good fibrous material, development potentiality is huge.Polylactic acid different shrinkage fiber is answered by the silk of two kinds of different shrinkage degrees
It closes, it is real intelligent multi-function fiber that fabric, which has good feel, and application field is more abundant.
Currently, the technical method of domestic production polylactic acid one step sprinning is not very much, technical capability is also very limited, produces
The contraction stability of the polylactic acid one step sprinning come is low, and effective popularization of product is caused to form obstruction.
Summary of the invention
In view of the above existing problems in the prior art, the present invention provides a kind of lifes of different contraction composite fiber of PLA polylactic acid
Production method, in favor of effective popularization of the different contraction composite fiber of PLA polylactic acid.
The present invention through the following technical solutions to achieve the above objectives:
A kind of production method of the different contraction composite fiber of PLA polylactic acid, the production method include:
Polylactic acid raw material is provided；
Provided polylactic acid raw material is dry, and the polylactic acid raw material moisture content after drying is less than 25ppm；
Polylactic acid raw material after drying is delivered in filament spinning component by screw extruder, the polylactic acid raw material is through institute
Screw extruder melting compression is stated, the polylactic acid raw material of molten condition is formed, the temperature of the screw extruder is controlled at 170 DEG C
~230 DEG C；
The polylactic acid raw material of the molten condition sprays the part FDY tow and the part POY tow through the filament spinning component；
The part FDY tow and the part POY tow pass through cross air blowing device, oiling device and path, institute simultaneously
The blowing temperature for stating cross air blowing device is 18 DEG C~22 DEG C；
The part the FDY tow pulled out from the path successively passes through first pair of hot-rolling group and second pair of hot-rolling group
Traction stretches, meanwhile, the part the POY tow pulled out from the path successively passes through the first draw-off godet and the second seal wire
Disk traction stretches；
The part FDY tow after traction stretches enters master network device network with the part POY tow together and answers
After merging net, spinning cake is wound into up- coiler.
Further, the polylactic acid raw material be spinning-grade polylactic acid slice, average molecular weight 200000-300000 it
Between, fusing point is 173-178 DEG C.
Further, described that provided polylactic acid raw material is dry, it specifically includes:
Provided polylactic acid raw material is dried by drying system, the drying system includes crystallizer and does
Dry tower, the crystallizer include shell, are provided with feed inlet at the top of the shell, the feed inlet be located at feed bin just under
It is square, it is provided with impurity removal port at the top of the shell side, the bottom of the shell is provided at least two air inlets；
Hot wind is introduced by least two air inlets, by the polylactic acid raw material fallen into from the feed inlet it is dry and
Pre-crystallized, after drying the same dust of hot wind, is discharged from impurity removal port；
The side of the drying tower is provided at least two air inlets, introduces dry air by least two air inlets,
The drying of the polylactic acid raw material after removing chalk dust removing will be dropped into drying tower；
The crystallization temperature of the crystallisation chamber is 85 DEG C~105 DEG C, and 85 DEG C~105 DEG C of the drying temperature of the drying tower is done
Dry 5~20 hours.
Further, the filament spinning component includes spinning manifold, melt feed pipe, melt distribution pipe, metering pump and spinning
Silk device, in which:
One end of the melt feed pipe is connected with the output end of the melt extruded machine, the melt feed pipe it is another
End is protruded into the spinning manifold；
The melt distribution pipe, metering pump and filator are arranged in the spinning manifold；
There are two melt distribution pipe settings, and one end of each melt distribution pipe is and the melt feed pipe
The other end connects, and is provided with the metering pump in each melt distribution pipe；
The filator and the melt distribution pipe are arranged in a one-to-one correspondence, and the filator includes melt conveying general pipeline, melts
Body processor, melt conveying branch pipe and spinning plate, one end of the melt conveying general pipeline and the corresponding melt distribution pipe
Other end connection, the other end of the melt conveying general pipeline are connected with the melt treatment device, the melt conveying branch pipe setting
Have multiple, multiple melt conveying branch pipes are connected with the melt treatment device, and the spinning plate is provided with multiple spinneret orifices, institute
It states spinneret orifice and the melt conveying branch pipe is arranged in a one-to-one correspondence, the other end of the melt conveying branch pipe is connected to corresponding institute
It states in spinneret orifice.
Further, the polylactic acid slice of the molten condition sprays the part FDY tow and the portion POY through the filament spinning component
After sub-tow, the polylactic acid raw material of not formed tow is siphoned away by suction unit, the suction unit is arranged in the spinning
Between component and the cross air blowing device.
Further, the cross air blowing device includes blowing cabinet, air inlet cylinder, and the blowing top of the box is provided with multiple
Harness cord hole, the blowing bottom of box are provided with hole and wind net, and the level one of the through hole is arranged in the wind net
The lower section of the wind net is arranged in side, the air inlet cylinder；
Multiple harness cord holes and the through hole are located on same vertical direction.
Further, the blowing cabinet has the first side wall, and the first side wall is close to the wind net, first side
Wall and the wind net setting at an acute angle.
Further, filter layer, the top and bottom difference of the filter screen are vertically provided in the blow box body
Top and the wind for being connected to the first side wall are online.
Further, the blowing cabinet also has second sidewall, and the second sidewall and the first side wall are opposite
Setting is provided with two fans relatively and openable door in the second sidewall.
Further, the part the FDY tow pulled out from the path successively passes through first pair of hot-rolling group
Before being stretched with second pair of hot-rolling group traction further include:
The part the FDY pulled out from the path first passes through pre- Network device and forms network knot.
Further, the part the FDY tow pulled out from the path successively passes through first pair of hot-rolling group
It stretches, specifically includes with second pair of hot-rolling group traction:
The part the FDY tow pulled out from the path first passes through first pair of hot-rolling group, first pair of hot-rolling
The heat roller temperature of group is 70 DEG C~100 DEG C, and wrapping wire 4.5~6.5 encloses；
The part FDY tow by first pair of hot-rolling group is re-fed into second pair of hot-rolling group, second pair of hot-rolling
The heat roller temperature of group is 90 DEG C~130 DEG C, and drafting multiple 1.3~2.5, wrapping wire 4.5~6.5 encloses.
The beneficial effects of the present invention are:
A kind of production method of different contraction composite fiber of PLA polylactic acid provided by the present invention, first does polylactic acid raw material
It is dry, since the moisture content of the polylactic acid raw material after drying is less than 25ppm, to prevent raw material pyrohydrolysis；It is poly- after being subsequently dried
Lactic raw material enters screw extruder and carries out melting compression, since the temperature control of screw extruder is at 170 DEG C~230 DEG C, with
Guarantee that the raw material under melt state is uniform and stable；It melts compressed polylactic acid raw material to enter in filament spinning component, passes through spinning group
Part sprays melt stream tow, and melt stream tow is divided into the mutually independent part FDY tow and the part POY tow, and subsequent two
Part tow is cooled down through cross air blowing device, oiling device and path, since the blowing temperature control of cross air blowing device is 18
DEG C~22 DEG C, it is ensured that full and uniform cooling prevents from being quenched, and then the part FDY tow is stretched through two pairs of hot-rolling group tractions, to protect
The product quality for demonstrate,proving the part FDY tow, the part the FDY tow after two pairs of hot-rolling group tractions stretch are led with through two draw-off godets
The part the POY tow stretched that is pulled enter together master network device it is network combined it is grid-connected after, be wound into spinning cake into up- coiler.
The production method of the provided different contraction composite fiber of PLA polylactic acid through the invention, the different receipts of obtained polylactic acid
Contracting composite fibre is soft fine and smooth, and comfortable feel type is better than terylene abnormal contraction composite filament, is more suitable for weaving high-quality fabric, be conducive to
Effective popularization of the different contraction composite fiber of PLA polylactic acid.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is a kind of structural schematic diagram of the process units of different contraction composite fiber of PLA polylactic acid of the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the drying system of Fig. 1；
Fig. 3 is the structural schematic diagram of the filament spinning component in Fig. 1；
Fig. 4 is the schematic internal view of Fig. 3；
Fig. 5 is the schematic top plan view of Fig. 3；
Fig. 6 is the structural schematic diagram of the filator of the filament spinning component in Fig. 3；
Fig. 7 is the structural schematic diagram of the cross air blowing device in Fig. 1；
Fig. 8 is the schematic side view of Fig. 7；
Fig. 9 is a kind of flow diagram of the production method of different contraction composite fiber of PLA polylactic acid of the embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Firstly, the embodiment of the invention discloses a kind of process units of different contraction composite fiber of PLA polylactic acid.
Fig. 1 is a kind of structural schematic diagram of the process units of different contraction composite fiber of PLA polylactic acid of the embodiment of the present invention,
Referring to
Fig. 1, the device include the drying system 1 set gradually by process flow, screw extruder 2, filament spinning component 3, take out
Inhale device 4, cross air blowing device 5, oiling device 6, path 7, drafting component, Network device 13 and up- coiler 16.
Fig. 2 is the structural schematic diagram of the drying system of Fig. 1, and in conjunction with Fig. 2, the drying system 1 of the embodiment of the present invention includes knot
Brilliant device 1.1 and drying tower 1.2, wherein crystallizer 1.1 includes shell, is provided with feed inlet 1.11, feed inlet at the top of shell
1.11 are located at the underface of feed bin a, are provided with impurity removal port 1.12 at the top of shell side, the bottom of shell is provided at least two
Air inlet 1.13.Polylactic acid raw material enters in crystallizer 1.1 from feed bin a, feed inlet 1.11, meanwhile, by least two into
Hot wind is introduced into crystallizer 1.1 by air port 1.13, and hot wind is by raw material drying, due to being the crystallizers for using double air inlets,
The heat of offer is more sufficient, to realize the crystallization of polylactic acid raw material；It, can be by raw material meanwhile during hot wind is by dry feedstock
In the light impurities such as the dust that is mixed be discharged from impurity removal port 1.12, to keep the purity of polylactic acid raw material.
In the embodiment of the present invention, hot wind can be introduced into crystallizer 1 by pressure fan and conveyance conduit.
Further, in conjunction with Fig. 2, the side of the drying tower 1.2 of the embodiment of the present invention is provided at least two air inlets
1.21, dry air is introduced by least two air inlets 1.21, the polylactic acid after removing chalk dust removing in drying tower will be dropped into
Raw material stoving.
Since the drying tower 1.2 in the embodiment of the present invention is also provided with two air inlets 1.21, can be conveyed by air pump
More dry airs, to make the more uniform stabilization of the drying effect of polylactic acid raw material.
In the embodiment of the present invention, screw extruder 2 can select novel alloy covered type to roast the bimetallic for penetrating technical treatment
Bolt special extruder, band pin mixing refining head, draw ratio 25 in this way may be used with one area's feed end of screw rod to six area's discharge ends
To guarantee that melt is uniform and stable.
Fig. 3 is the structural schematic diagram of the filament spinning component in Fig. 1, and Fig. 4 is the schematic internal view of Fig. 3, and Fig. 5 is the vertical view of Fig. 3
Schematic diagram, in conjunction with Fig. 3-Fig. 5, the filament spinning component 3 of the embodiment of the present invention includes spinning manifold 3.1, melt feed pipe 3.2, melt
Distribution pipe 3.3, metering pump 3.4 and filator 3.5, one end of melt feed pipe 3.2 and the output end of melt extruded machine 2 connect
It connects, the other end of melt feed pipe 3.2 protrudes into spinning manifold 3.1, melt distribution pipe 3.3, metering pump 3.4 and filator
3.5 are arranged in spinning manifold 3.1, and there are two the settings of melt distribution pipe 3.3, one end of each melt distribution pipe 3.3 and
The other end of melt feed pipe 3.2 connects, and is provided with metering pump 3.4 in each melt distribution pipe 3.3.
Fig. 6 is the structural schematic diagram of the filator of the filament spinning component in Fig. 3, in conjunction with Fig. 6, the filator of the embodiment of the present invention
3.5 and melt distribution pipe 3.3 be arranged in a one-to-one correspondence, filator includes melt conveying general pipeline 3.51, melt treatment device 3.52, molten
Body delivery branch pipe 3.53 and spinning plate 3.54, one end of melt conveying general pipeline 3.53 and corresponding melt distribution pipe 3.3 it is another
End connection, the other end and melt treatment device 3.52 connection of melt conveying general pipeline 3.53, melt conveying branch pipe 3.53 is provided with more
A, multiple melt conveying branch pipes 3.53 and melt treatment device 3.52 connect, and spinning plate 3.54 is provided with multiple spinneret orifices, spinneret orifice
It is arranged in a one-to-one correspondence with melt conveying branch pipe 3.53, the other end of melt conveying branch pipe 3.53 is connected in corresponding spinneret orifice.
When implementing, polylactic acid raw material in a molten state enters two melt distribution pipes through melt feed pipe 3.2
3.3, then quantitative polylactic acid raw material is exported into corresponding filator 3.5 by metering pump 3.4, pass through the molten of filator 3.5
Body delivery main 3.51, which enters in melt treatment device 3.52, is filtered pressurization, then defeated by multiple melt conveying branch pipes 3.53
Enter into corresponding spinneret orifice, to be processed into fibre bundle.
In addition, the filament spinning component 3 in the embodiment of the present invention can also include heat medium pipe, heat medium pipe is fixed at manifold
On body 3.1, flowing has thermal medium in heat medium pipe, to the pipeline heating passed through to melt, and then heats and protects to melt feed
Temperature prevents raw material in a molten state from solidifying cooling, influences wire vent.
Specific in the embodiment of the present invention, thermal medium used in heat medium pipe can be 200 DEG C of boiling point or so of low temperature
Biphenyl Ether does heating agent, controls 200~230 DEG C of temperature, certainly, thermal medium can be hot oil, or gas, the present invention are real
Example is applied to this with no restriction.
In the embodiment of the present invention, due to being provided with metering pump 3.4 in each melt distribution pipe 3.3, not only it may be implemented
Melt feed can also be continuously accurately-supplied filator by the conveying of melt feed, for quantitative spinning, metering pump 3.4
The planetary metering pump of resistant material can be selected, so that the conveying of melt feed is more accurate.
The embodiment of the present invention passes through the melt treatment device 3.52 in filator 3.5 due to being provided with two filators 3.5
Different disposal, the heads number such as output bilateral symmetry is distributed the part FDY tow and the part POY tow respectively.
Further, spinning plate 3.54 can be the plate that radius is 95~105mm, and the section of spinneret can be circle
Type or abnormal shape, instinct inventive embodiments to this with no restriction.
The lower section of filament spinning component 3 is arranged in the suction unit 4 of the embodiment of the present invention, for by the polylactic acid of not formed tow
Monomer siphons away, in order to avoid influencing the progress of subsequent technique, and guarantees the quality of tow.
The suction unit 4 of the embodiment of the present invention can use recirculated water negative-pressure ward, sufficiently to extract monomer out.
Fig. 7 is the structural schematic diagram of the cross air blowing device 5 in Fig. 1, and Fig. 8 is the schematic side view of Fig. 7, in conjunction with Fig. 7 and figure
8, the cross air blowing device 5 of the embodiment of the present invention includes blowing cabinet 5.1, air inlet cylinder 5.2, is provided at the top of cabinet 5.1 of drying more
The spinneret orifice of a harness cord hole, the harness cord hole and filament spinning component is arranged in a one-to-one correspondence, blowing 5.1 bottom of cabinet be provided with hole with
And the horizontal side of through hole is arranged in wind net 5.3, wind net 5.3, the lower section of wind net 5.3, multiple harness cords are arranged in air inlet cylinder 5.2
Hole and through hole are located on same vertical direction.
In use, the tow that the spinneret orifice in filament spinning component sprays is by corresponding harness cord hole, and it is introduced into blowing cabinet
It is interior, then drawn from through hole, meanwhile, the air inlet cylinder that the output section of blowing device is connected introduces cooling wind, and then will be by blowing
The tow of wind box cools down.
The blowing device of the embodiment of the present invention can for hair dryer etc., the embodiment of the present invention to the type of blowing device herein
With no restrictions.
In conjunction with Fig. 7, in the embodiment of the present invention, suction unit 4 may include suction tube, and one end of the suction tube is located at blowing
In cabinet 5.1, suction tube it is open at one end, the other end of suction tube is located at outside blowing cabinet 5.1, and then by not formed tow
Polylactic acid monomer from open end siphon away to blowing 5.1 collected outside of cabinet.
In conjunction with Fig. 7 and Fig. 8, the blowing cabinet 5.1 of the embodiment of the present invention has the first side wall 5.11, and the first side wall 5.11 leans on
Nearly wind net 5.3, the first side wall 5.11 and the setting at an acute angle of wind net 5.3, can make the first side wall 5.11 form guide plate in this way, with
Cooling wind is more efficiently introduced, realizes the rapid cooling of tow.
In conjunction with Fig. 7 and Fig. 8, filter layer 5.4, filter layer are vertically provided in the blowing cabinet 5.1 of the embodiment of the present invention
5.4 top and bottom are connected on the top and wind net 5.3 of side wall 5.11, filter layer can to direct and tow into
The cooling wind of row heat exchange is filtered, and is avoided having and is wound impurity on the tow of the condition of high temperature, and the quality of tow is influenced.
In the embodiment of the present invention, filter layer 5.4 is arranged in pluggablely in air inlet box body 5.1, not only can into
Enter the intracorporal cooling wind filtering of blow box, guarantees the quality of production of tow, dismounting cleaning periodically can also be carried out to filter screen, protect
Card cooling wind passes through.
Further, the filter layer 5.4 of the embodiment of the present invention can be porous from what is horizontally set gradually into cabinet
Filter plate, filter screen and cellular board are combined into, in this way can be from outside to inside to different size of contaminant filter.
Further, in conjunction with Fig. 7 and Fig. 8, the blowing cabinet 5.1 of the embodiment of the present invention has second sidewall 5.12, this
Two side walls 5.12 and the first side wall 5.11 are oppositely arranged, and two fans are provided in second sidewall 5.12 relatively and openable door
5.13, box house can not only be observed, and when phenomena such as tow knotting occurs in the inside of cabinet, it can be to tow
It is operated.
The cooling effect of tow not only can be improved due to being to cool down using air cooling way to tow in the embodiment of the present invention
Fruit can also improve the spinning speed of equipment, improve the yield of finished fiber tow.
Further, in conjunction with Fig. 7, in the embodiment of the present invention, blowing cabinet 5.1 is being with the corresponding height of filter layer 5.4
Blowing area, height is 1400~1800mm, and D type outlet air curve prevents from being quenched to guarantee full and uniform cooling, and is dried
The corresponding height below spinning manifold of cabinet 5.1 is zone of silence, and height is 90~130mm, this is because zone of silence height
It will have a direct impact on tow quality, the setting of zone of silence height of the embodiment of the present invention can drop too fast to avoid at a temperature of, cause silk
Ropy phenomenon.
Further, the oiling device 6 in the embodiment of the present invention is oil nozzle oil feeding system, uses anti-splashing, low friction, resistance to
Mill oil nozzle oils, this batten is dry to be stablized, and guarantees dyeing uniformity.
Path 7 is the channel that tow passes through naturally in the embodiment of the present invention, for making the tow after oiling oil sufficiently, and
It prevents from fading, length can according to need specific setting.
In conjunction with Fig. 1, in the embodiment of the present invention, in conjunction with Fig. 1, in the embodiment of the present invention, drafting component includes in parallel first
Drafting unit and the second drafting unit, the first drafting unit include 8, the first pairs of heat of pre- Network device set gradually by process flow
9, second pairs of hot-rolling groups 10 of roller group, the second drafting unit include the first draw-off godet 11 and second set gradually by process flow
Draw-off godet 12.
In the prior art, each pair of draw roll in drafting component, usually chilling roller and hot-rolling are collocated with each other use, make in this way
At, uneven heating insufficient to the tensioning of fibre bundle, the physical property of fibre bundle is caused to differ larger, breaking strength
It is low, it is not able to satisfy the requirement of later process, the embodiment of the present invention improves this.
In the embodiment of the present invention, first pair of hot-rolling group 9 and second pair of hot-rolling group 10 are made of two hot-rollings, so as to
It is stabilized the elongation of the part the FDY for constituting the different contraction composite fiber of PLA polylactic acid and internal structure, is effectively eliminated in it
The drafting stress in portion, improves the shape stability of fibre bundle, and improves the breaking strength of fibre bundle, reduces fibre bundle
End breakage rate.
The embodiment of the present invention before the part FDY tow enters first pair of hot-rolling group 9 and second pair of 10 process of hot-rolling group,
It is also provided with pre- Network device 8, the part FDY tow can be made to knot in this way, further decrease end breakage rate.
Due to the characteristic of the part POY of the composition different contraction composite fiber of PLA polylactic acid, do not need to stretch herein, therefore,
The embodiment of the present invention only passes through the first draw-off godet 11, second spinning reel 12 is oriented to the part POY tow.
After drafting component, it is compound grid-connected to enter master network device for the part FDY tow and the part POY tow, then, leads to
It crosses up- coiler and is wound into spinning cake.The up- coiler of the embodiment of the present invention is accurate anti-stacked system, can fully ensure that silk forms in this way
Well, up- coiler is generally 16~24, to guarantee enough production capacities, increases economic efficiency.
In addition, the process units based on the above-mentioned different contraction composite fiber of PLA polylactic acid, the embodiment of the invention also provides
The production method of the different contraction composite fiber of PLA polylactic acid.
Fig. 9 is a kind of flow diagram of the production method of different contraction composite fiber of PLA polylactic acid of the embodiment of the present invention,
In conjunction with Fig. 9, which includes:
S1: polylactic acid raw material is provided；
S2: provided polylactic acid raw material is dry；
S3: the polylactic acid raw material after drying is delivered in filament spinning component by screw extruder, polylactic acid raw material is through spiral shell
The melting compression of bar extruder, forms the polylactic acid raw material of molten condition；
S4: the polylactic acid raw material of molten condition sprays the part FDY tow and the part POY tow through filament spinning component；
The part S5:FDY tow and the part POY tow pass through cross air blowing device, oiling device and path simultaneously；
S6: the part the FDY tow pulled out from path successively passes through first pair of hot-rolling group and second pair of hot-rolling group traction
It stretches, meanwhile, the part the POY tow pulled out from path successively passes through the first draw-off godet and second spinning reel traction stretches；
S7: it is network combined grid-connected that the part the FDY tow after traction stretches with the part POY tow enters master network device together
Afterwards, spinning cake is wound into up- coiler.
The S1 of the embodiment of the present invention is specifically included:
The polylactic acid raw material of the embodiment of the present invention is preferably spinning-grade PLA polylactic acid slice, average molecular weight 200000
~300000,173-178 DEG C of fusing point, the polylactic acid raw material for providing high quality is to guarantee that spinning is smoothly crucial, has above-mentioned spy
Property polylactic acid slice i.e. can guarantee spinning it is smooth.
The S2 of the embodiment of the present invention is specifically included:
Due to polylactic acid easily pyrohydrolysis, it is necessary to strict control moisture content, drying system through the embodiment of the present invention
Afterwards, need to by the moisture control of polylactic acid raw material in 25ppm hereinafter, to prevent raw water solution, cause spinning quality to decline.
Since polylactic acid thermal stability is poor, the excessively high influence spinnability of drying temperature, therefore, through the embodiment of the present invention dry
When drying system, crystallization temperature is controlled between 85 DEG C~105 DEG C, and drying temperature controls between 85 DEG C~105 DEG C, dry 5~
20 hours.The quality of polylactic acid raw material after drying is stablized, and just can guarantee that spinning is gone on smoothly.
The S3 of the embodiment of the present invention is specifically included:
One area's feed end of screw rod of the screw extruder of the embodiment of the present invention to six area's discharge end temperature control 170 DEG C~
Between 230 DEG C, to guarantee that melt is uniform and stable.
The S4 of the embodiment of the present invention is specifically included:
Since the polylactic acid raw material stability under molten condition is poor, the digit of every line of filament spinning component, head number are set
Meter, it is necessary to strict control melt residence time < 20min.General every line is no more than 4, every 16-24 head, residence time mistake
Long, degradation is seriously unfavorable for spinning production, finished silk poor quality.
In the embodiment of the present invention, the heat medium pipe of filament spinning component does heating agent using 200 DEG C of boiling point or so of low temperature Biphenyl Ether, controls
200~230 DEG C of temperature processed, and keep heating agent circulation abundant, it is ensured that homogeneous heating.
The S5 of the embodiment of the present invention is specifically included:
The cross air blowing device of the embodiment of the present invention is blown using D type outlet air curve, and supply air temperature is 18~22 DEG C,
To guarantee full and uniform cooling, prevent from being quenched.
The S6 of the embodiment of the present invention is specifically included:
The roller group temperature of first pair of hot-rolling group is 70 DEG C~100 DEG C, and wrapping wire 4.5~6.5 encloses, the roller group of second pair of hot-rolling group
Temperature is 90 DEG C~130 DEG C, and drafting multiple 1.3~2.5, wrapping wire 4.5~6.5 encloses.Since polylactic acid fusing point is low, thermostabilization is poor,
Therefore, setting temperature is no more than 130 DEG C.
The S7 of the embodiment of the present invention is specifically included:
The part FDY and every of the part POY tow correspond compound grid-connected, the master network pressure that is combined into master network device
0.4-0.6mpa。
The up- coiler speed of the embodiment of the present invention need to control as 2500~3500m/min.
The tow produced by aforementioned production method, the elongation 60-100%, FDY of the part POY therein tow
The elongation of partial tow is 25-45%, to have preferable different contractive effect.
Concrete application:
Using above-mentioned process units and production method, the different contraction composite fiber of 73dtex/48fPLA polylactic acid, POY are prepared
Part tow 48dtex/30f, the part FDY tow 25dtex/18f, the molecular weight of polylactic acid raw material used are 210000, fusing point
It is 175 DEG C, moisture content 21ppm；Using 105 screw rod of Φ, point 5th area heating, each area's temperature is respectively as follows: 178 DEG C of area's temperature, and two
188 DEG C of area's temperature, three 205 DEG C of area's temperature, four 218 DEG C of area's temperature, five 225 DEG C of area's temperature；Condition of spinning manifold temperature is 228 DEG C, calm
Area height 120mm, cooling device cross air blasting height 1500mm, 21 DEG C of wind-warm syndrome, wind speed 0.35m/s, the spinneret plate gauge of filament spinning component
Lattice are Φ 105mm, and section is circular cross-section micropore, 75 DEG C of the temperature of first pair of hot-rolling group, speed 1510m/min, second pair
105 DEG C of the temperature of hot-rolling group, speed 2730m/min, the speed 2700m/min of the first draw-off godet, the speed of second spinning reel
2720m/min, the winding speed 2710m/min of up- coiler.The different contraction composite fiber breaking strength >=2.2cN/ of obtained finished product
Dtex, extension at break 46%, boiling water shrinkage 51.0%, oil content 0.89%, internet pricing 35.
In conclusion the production method of the different contraction composite fiber of PLA polylactic acid provided by through the invention, what is obtained is poly-
The different contraction composite fiber of lactic acid is soft fine and smooth, and comfortable feel type is better than terylene abnormal contraction composite filament, is more suitable for weaving high-quality fabric,
Be conducive to effective popularization of the different contraction composite fiber of PLA polylactic acid.
Following illustrated embodiment is better embodiment of the invention, only is used to facilitate to illustrate the present invention, not to this hair
The bright limitation made under any form has usually intellectual in any technical field, if not departing from the proposed skill of the present invention
In the range of art feature, using the equivalent embodiment for locally changing or modifying made by disclosed technology contents, and
Without departing from technical feature content of the invention, in the range of still falling within the technology of the present invention feature.
Claims (10)
1. a kind of production method of the different contraction composite fiber of PLA polylactic acid, which is characterized in that the production method includes:
Polylactic acid raw material is provided；
Provided polylactic acid raw material is dry, and the moisture content of the polylactic acid raw material after drying is less than 25ppm；
Polylactic acid raw material after drying is delivered in filament spinning component by screw extruder, the polylactic acid raw material is through the spiral shell
The melting compression of bar extruder, forms the polylactic acid raw material of molten condition, the temperature control of the screw extruder 170 DEG C~
230℃；
The polylactic acid raw material of the molten condition sprays the part FDY tow and the part POY tow through the filament spinning component；
The part FDY tow and the part POY tow pass through cross air blowing device, oiling device and path, the side simultaneously
The blowing temperature of blowing device is 18 DEG C~22 DEG C；
The part the FDY tow pulled out from the path successively passes through first pair of hot-rolling group and second pair of hot-rolling group traction
It stretches, meanwhile, the part the POY tow pulled out from the path successively passes through the first draw-off godet and second spinning reel is led
It is pulled and stretches；
It is network combined simultaneously that the part FDY tow after traction stretches with the part POY tow enters master network device together
After net, spinning cake is wound into up- coiler.
2. the production method of the according to claim a kind of different contraction composite fiber of PLA polylactic acid, which is characterized in that described
Polylactic acid raw material is spinning-grade polylactic acid slice, and for average molecular weight between 200000-300000, fusing point is 173-178 DEG C.
3. a kind of production method of different contraction composite fiber of PLA polylactic acid according to claim 1, which is characterized in that institute
It states the drying of provided polylactic acid raw material, specifically includes:
Provided polylactic acid raw material is dried by drying system, the drying system includes crystallizer and drying
Tower, the crystallizer include shell, and feed inlet is provided at the top of the shell, and the feed inlet is located at the underface of feed bin,
Impurity removal port is provided at the top of the shell side, the bottom of the shell is provided at least two air inlets；
Hot wind is introduced by least two air inlets, by the polylactic acid raw material fallen into from the feed inlet drying and pre- knot
Crystalline substance, the same dust of hot wind after drying, is discharged from impurity removal port；
The side of the drying tower is provided at least two air inlets, introduces dry air by least two air inlets, will
The drying of polylactic acid raw material after removing chalk dust removing is dropped into drying tower；
The crystallization temperature of the crystallisation chamber is 85 DEG C~105 DEG C, 85 DEG C~105 DEG C of the drying temperature of the drying tower, dry 5~
20 hours.
4. a kind of production method of different contraction composite fiber of PLA polylactic acid according to claim 1, which is characterized in that institute
Stating filament spinning component includes spinning manifold, melt feed pipe, melt distribution pipe, metering pump and filator, in which:
One end of the melt feed pipe is connected with the output end of the melt extruded machine, and the other end of the melt feed pipe is stretched
Enter in the spinning manifold；
The melt distribution pipe, metering pump and filator are arranged in the spinning manifold；
There are two the melt distribution pipe settings, and one end of each melt distribution pipe is another with the melt feed pipe
End connects, and is provided with the metering pump in each melt distribution pipe；
The filator and the melt distribution pipe are arranged in a one-to-one correspondence, and the filator includes melt conveying general pipeline, at melt
Manage device, melt conveying branch pipe and spinning plate, one end of the melt conveying general pipeline and the corresponding melt distribution pipe it is another
End connection, the other end of the melt conveying general pipeline are connected with the melt treatment device, and the melt conveying branch pipe is provided with more
A, multiple melt conveying branch pipes are connected with the melt treatment device, and the spinning plate is provided with multiple spinneret orifices, the spinning
Wire hole and the melt conveying branch pipe are arranged in a one-to-one correspondence, and the other end of the melt conveying branch pipe is connected to the corresponding spinning
In wire hole.
5. a kind of production method of different contraction composite fiber of PLA polylactic acid according to claim 1, which is characterized in that institute
The polylactic acid raw material of molten condition is stated after the filament spinning component sprays the part FDY tow and the part POY tow, is filled by suction
It sets and siphons away the polylactic acid raw material of not formed tow, the suction unit is arranged in the filament spinning component and the cross air blowing device
Between.
6. a kind of production method of the different contraction composite fiber of PLA polylactic acid according to claim 1 or 5, which is characterized in that
The cross air blowing device includes blowing cabinet, air inlet cylinder, and the blowing top of the box is provided with multiple harness cord holes, the blow box
Body bottom is provided with hole and wind net, and the horizontal side of the through hole, the air inlet cylinder setting is arranged in the wind net
In the lower section of the wind net；
Multiple harness cord holes and the through hole are located on same vertical direction.
7. a kind of production method of different contraction composite fiber of PLA polylactic acid according to claim 6, which is characterized in that institute
Stating blowing cabinet has the first side wall, and for the first side wall close to the wind net, the first side wall and the wind net are at an acute angle
Setting.
8. a kind of production method of different contraction composite fiber of PLA polylactic acid according to claim 6, which is characterized in that institute
It states and is vertically provided with filter layer in blow box body, the first side wall is connected at the top and bottom of the filter screen
Top and the wind are online.
9. a kind of production method of different contraction composite fiber of PLA polylactic acid according to claim 7, which is characterized in that institute
Stating blowing cabinet also has second sidewall, and the second sidewall and the first side wall are oppositely arranged, in the second sidewall
It is provided with that two fans are opposite and openable door.
10. a kind of production method of different contraction composite fiber of PLA polylactic acid according to claim 1, which is characterized in that institute
It states the part the FDY tow pulled out from the path and successively passes through first pair of hot-rolling group and second pair of hot-rolling group traction drawing
It stretches, specifically includes:
The part the FDY tow pulled out from the path first passes through first pair of hot-rolling group, first pair of hot-rolling group
Heat roller temperature is 70 DEG C~100 DEG C, and wrapping wire 4.5~6.5 encloses；
The part FDY tow by first pair of hot-rolling group is re-fed into second pair of hot-rolling group, second pair of hot-rolling group
Heat roller temperature is 90 DEG C~130 DEG C, and drafting multiple 1.3~2.5, wrapping wire 4.5~6.5 encloses.
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Cited By (3)
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| CN112680853A (en) * | 2020-11-24 | 2021-04-20 | 苏州帝达化纤机械制造有限公司 | Multifunctional spinning equipment for producing ceramic fibers POY and FDY |
| CN112981568A (en) * | 2021-01-20 | 2021-06-18 | 浙江恒优化纤有限公司 | Spinning equipment and spinning process for high-strength low-shrinkage composite fibers |
| CN113564736A (en) * | 2021-07-27 | 2021-10-29 | 张家港锦亿化纤有限公司 | Chemical fiber monofilament production process for optimizing fiber performance |
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Application publication date: 20190726 |